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Personalized image-based templates for precise acetabular prosthesis placement in total hip arthroplasty:a pilot study

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2010年第9期11卷 673-680页

作者： Bin CHEN Sheng-xiang xiao peng-cheng GU xiang-jin LIN Department of Orthopaedics the First Affiliated Hospital School of Medicine Zhejiang University Hangzhou 310003 China

Objective：In order to achieve accurate implantation of the acetabular prosthesis in total hip arthroplasty（THA）,we designed individual templates based on a three-dimensional（3D） model generated from computed tomography（CT） ***：Individual templates were designed for 12 patients who underwent THA.A physical template was designed to conform to the contours of the patient＇s acetabulum and to confirm the rotation of the acetabular *** guided the acetabular component ***：The preoperative and postoperative X-ray and CT scans were obtained to assess the location with respect to the accuracy of the acetabular *** all patients,the abduction angle of the acetabular component was 46.7°to 54.3°and the anteversion angle was 11.3°to 18.5°Conclusions：The assessment of postoperative CT scans demonstrated higher accuracy of the acetabular component bore when used with the individual ***,the individual template can be an alternative to the computer-assisted navigation systems,with a good cost-performance ratio.

关键词： Total hip arthroplasty Templates Acetabular prosthesis

Microstructure and properties of Cu-2.8Ni-0.6Si alloy

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Rare Metals 2013年第3期32卷 228-233页

作者： xiang-peng xiao Bai-Qing Xiong Guo-Jie Huang Lei Cheng Li-Jun peng Qi-Ming Liang State Key Laboratory for Fabrication and Processing of Nonferrous Metals General Research Institute for Nonferrous Metals China Nonferrous Metals Processing Technology Albetter Albronze Co. Ltd.

The phase transformation behavior and heat treatment response of Cu-2.8Ni-0.6Si （wt%） alloy sub- jected to different heat treatments were studied by X-ray diffraction, transmission electron microscopy observation, and measurement of hardness and electrical conductivity. The variation of hardness and electrical conductivity of the alloy was measured as a function of aging time. On aging at the temperature below TR （500-550 ℃） in Cu-2.8Ni-0.6Si alloy, the transformation undergoes spinodal decomposi- tion, DO22 ordering, and δ-NiaSi phase. On aging at the temperature above TR （500-550 ℃）, the transformation products were precipitations of 8-Ni2Si. The free energy versus composition curves were employed to explain the microstructure observations.

关键词： Microstructure Hardness Electricalconductivity Spinodal decomposition DO22 ordering

Microstructure and properties of Cu-Ni-Si-Zr alloy after thermomechanical treatments

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Rare Metals 2013年第2期32卷 144-149页

作者： xiang-peng xiao Bai-Qing Xiong Qiang-Song Wang Guo-Liang Xie Li-Jun peng Guo-Xing Huang State Key Laboratory for Fabrication and Processing of Non-ferrous Metals General Research Institute for Nonferrous Metals Aluminum Corporation of China Limited Luoyang Copper Co. Ltd.

The effect of thermomechanical treatments on the microstructures and properties of Cu-2.1Ni-0.5Si- 0.2Zr alloy was investigated. The hot-rolled plates were solution treated at 920 ℃ for 1.5 h, quenched into water, cold rolled by 70 % reduction in thickness, and then aged at 400, 450 and 500 ℃for various times. The variation in tensile strength and electrical conductivity of the alloy was measured as a function of the aging time. The results show the peak strength value of 665 MPa for the alloy aged at 450 ℃ for 2 h. However, the electrical conductivity is observed to reach a maximum of 47 % IACS aged at 450℃for 8 h. OM, SEM, and TEM were used for microstructural inspection of the alloy. Precipitation occurs preferentially at deformation bands in the cold-rolled alloy. Properties behavior is discussed in the light of microstructural features.

关键词： Cu-Ni-Si-Zr alloy Precipitation Electricalconductivity Tensile strength Microstructural features

Effect of pre-moxibustion on apoptosis and proliferation of gastric mucosa cells

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World Journal of Gastroenterology 2007年第15期13卷 2174-2178页

作者： Shou-xiang Yi Yan peng xiao-Rong Chang Na peng Jie Yan Yap-Ping Lin The Institute of Acupuncture Moxibustion and Massage Hunan University of Traditional Chinese Medicine Changsha 410007 Hunan Province China

AIM： TO observe the effects of pre-moxibustion on apoptosis and proliferation of gastric mucosal cell in rats with stress-induced ulcer, and to analyze the relationship between those effects and the expression of heat-shock protein 70 （HSP70）. METHODS： Sixty healthy Sprague Dawley rats were randomly assigned into four groups, namely group A, B, C and D. The animal model of stress ulcer was established by water immersion and restraint stress. The rats in group A, B, and D served as the restraint, model, and non-acupoint controls, respectively, while those in group C received moxibustion at Zusanli and Uangmen points. Immunohistochemical methodology was used to detect the expression of HSP70, apoptosis index （AI, × 10^-6/μm^2） and proliferation index （PCNA-LI, × 10^-6/μm^2）. The mucosal expression of transforming growth factor α （TGF-α） was detected by radioimmunoassay. RESULTS： IVloxibustion at Zusanli and Liangmen points significantly decreased the gastric injury and the apoptosis of gastric mucosal cells, while markedly increased the mucosal expression of TGF-α and HSP70 as well as the proliferation of gastric mucosal cells. Compared with group A, ulcer index （UI）（26.8 ± 9.8 vs 12.0 ± 5.9, P 〈 0.01）, AI （9.6 ± 4.2 vs 4.4 ± 2.6, P 〈 0.05） and expression of HSP70 （9.6 ± 4.2 vs 4.4 ± 2.6, P 〈 0.05） were significantly increased, but the content of TGF-α （104.7 ± 51.2 pg/mL vs 254.0 ± 86.9 pg/mL, P 〈 0.01） and PCNA-LI （6.9 ± 4.7 vs 14.9 ± 4.6, P 〈 0.05） were significantly decreased in group B. However, ulcer index values （UI） and AI were obviously lower in group C compared to groups B and D （14.1 ± 5.4 vs 26.8 ± 9.8 and 26.2 ± 7.7, P 〈 0.01, 3.0 ± 1.6 vs 9.6 ± 4.2 and 8.2 ± 5.2, P 〈0.05, respectively）, but content of TGF-α （237.0 ± 72.6 pg/mL vs 104.7 ± 51.2 pg/mL and 154.1 ± 61.3 pg/mL, P 〈0.01） and expression of HSP70 （0.13 ± 0.03 vs 0.08 ± 0.06 and 0.06 ± 0.04, P 〈 0.05） were higher in group C. Furthermore, the PCNA-LI was significantly higher in group C than in

关键词： Moxibustion Stress ulcer HSP70 Proliferating cell nuclear antigen Apoptosis

Coarsening behavior of（Ni,Co）2Si particles in Cu-Ni-Co-Si alloy during aging treatment

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Rare Metals 2019年第11期38卷 1062-1069页

作者： xiang-peng xiao Hai Xu Jin-Shui Chen Jun-Feng Wang Jiao Lu Jiao-Bo Zhang Li-Jun peng Institute of Engineering Research Jiangxi University of Science and TechnologyGanzhou 341000China School of Materials Science and Engineering Jiangxi University of Science and TechnologyGanzhou 341000China State Key Laboratory for Fabrication and Processing of Nonferrous Metals General Research Institute for Nonferrous MetalsBeijing 100088China

The coarsening behavior of(Ni,Co)2Si particles in Cu-Ni-Co-Si alloy was investigated by experimental observations and coarsening kinetics calculations when aged at 450,500,550 and 600℃ for different *** results show that the critical particle radius for coherence mismatch is found to be 10.3 nm,and particles larger than 25 nm are generally *** relationship of(Ni,Co)2Si particles size and aging time follows Lifshitz,Slyosov and Wagner(LSW) *** particle size distributions fit well to the LSW theoretical *** activation energy for(Ni,Co)2Si coarsening is accurately determined to be(216.21 ± 5.18)kJ mol-1 when considering the effect of temperature on the solution concentrations in *** coarsening of(Ni,Co)2Si particles in Cu-Ni-Co-Si alloy is controlled by diffusion of Ni,Co and Si in Cu *** growth of particles for long durations suggests that vacancies can be trapped within the structure for long time despite their mobility.

关键词： Coarsening behavior (Ni,Co)2Si particles Coherence mismatch LSW theory Particle size distributions

A Pitch-variation Moiré Fringes Method of Temporal Phase Unwrapping Profilometry

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Optoelectronics Letters 2007年第3期3卷 215-218页

作者： Tian Jin-dong peng xiang Zhao xiao-bo Key laboratory of Optoelectronic Devices and Systems of Education Ministry Institute of Optoelectronics ShenzhenUniversity Shenzhen 518060 China

A method of pitch-variation moiré fringes is proposed to realize the temporal phase unwrapping for three-dimensional profilometry. On the basis of the principle of moiré pattern,we achieve variable spatial frequencies of fringes in a moiré pattern by rotating two gratings. Furthermore a five-point fitting method is used to automatically compute the central position of side-lobe spectrum of the moiré fringes. Finally,a generalized temporal phase unwrapping algorithm is intro-duced to process the three-dimensional reconstruction. The theoretical analysis and experimental results show the validity of the proposed method.

关键词：表面光洁度测量法节距变分莫尔条纹法位相展开

Effect of solidification rate on dendrite segregation and mechanical properties of Cu-15Ni-8Sn alloy prepared by directional solidification

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Journal of Iron and Steel Research International 2023年第8期30卷 1586-1597页

作者： Yu-fan Shi Cheng-jun Guo Ming-quan Yuan Zhen-bin Jia Gui-huan An xiang-peng xiao Bin Yang Faculty of Materials Metallurgy and Chemistry Jiangxi University of Science and TechnologyGanzhou 341000JiangxiChina Jiangxi Advanced Copper Industry Research Institute Yingtan 335000JiangxiChina

The microstructures and mechanical properties of the directionally solidified Cu-15Ni-8Sn alloy were investigated at solidification rates ranging from 100 to 3000μm/*** results showed that the solidification rate significantly affects the phase distribution of the as-cast Cu-15Ni-8Sn *** primary and secondary dendritic spacing reduces and eventually becomes stable as the solidification rate ***,the size of the primary phase decreases,and its distribution becomes more *** most severe segregation problem of this alloy has been greatly *** solidification at 100μm/s,the as-cast Cu-15Ni-8Sn alloy consists of the α-Cu matrix,γ-CuNi_(2)Sn phase,discontinuous precipitation structure,modulated structure,and DO_(22) ordered ***,as the solidification rate increases,the discontinuous precipitation structure,modulated structures,and DO_(22) ordered phases decrease and even disappear,reducing *** the solidification rate increases,after homogenization treatment,the composition and microhardness distributions of Cu-15Ni-8Sn alloy become more *** time for homogenization is also *** reduces production energy usage and facilitates further mechanical processing.

关键词： Cu-15Ni-8Sn alloy Dendrite segregation Directional solidification Discontinuous precipitation structure DO_(22)ordered phase

EU Development Predicaments

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Contemporary International Relations 2011年第1期21卷 125-139页

作者： Yu xiang xiao peng Institute of European Studies CICIR

The massive debt of the EU member countries, the short sales of Wall Street, and intensifying media hype have resulted in the continued spread of the European sovereign debt crisis, a crisis that in fact stems from the EU's structural imbalance, an over-burdened high-welfare system, and political disunity among member countries of the EU. It is as yet uncertain whether those reforms implemented by the EU may be able to help ease the crisis as anticipated, but there is no doubt that the development trend of the EU has suffered a setback.

关键词：欧盟成员国债务福利制度经济发展

Construction of daily precipitation series and the observational characteristics of extreme precipitation in Tianjin,China during 1888-2022

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Advances in Climate Change Research 2024年第1期15卷 52-61页

作者： peng SI Qing-xiang LI xiao-Yang CHEN Min WANG Chuan-Jun LUO Tianjin Meteorological Information Center Tianjin Meteorological BureauTianjin 300074China Research Centerfor Ecology and Environment of Central Asia Chinese Academy of SciencesWulumuqi 830011China School of Atmospheric Sciences Sun Yat-sen UniversityZhuhai 528478China Key Laboratory of Tropical Amosphere-Ocean System Ministry of EducationZhuhai 528478China Shaoguan Meteorological Service Shaoguan 512028China

Given the difficulties in rescuing and ensuring the quality of long-term climate data,current studies on century-scale climate change are usually limited to annual and monthly data,resulting in the poor detection of extreme climate events and their changes before *** this study,we reconstructed a daily precipitation series for Tianjin from 15 September 1887 to 31 December 2022 on the basis of the most comprehensive daily precipitation records collected from the Tianjin Meteorological Archive,China,and in reference to the precipitation analysis results based on the datasets developed by the Climatic Research Unit Time-Series version 4.06,Global Precipitation Climatology Centre and University of Delaware along with the application of various homogenisation methods for climate *** approach provides a complete and reliable century-long daily precipitation series for the study of regional or local extreme weather and climate *** reconstructed daily dataset reveals that the annual precipitation amount and R95 intensity in Tianjin during 1888-2022 lack significant trends and have values of 0.74±6.99 and-1.84±3.22 mm per decade,*** the annual and seasonal scales,the precipitation amount and R95 intensity,particularly those in autumn,have increased since the latter half of the 20th century relative to those in ***,the increase in precipitation amount and R95 intensity is relatively limited compared with that in atmospheric water vapour content due to surface warming,indicating the highly sensitive response of extreme precipitation events to *** addition,the estimates for the return periods of 5,10,20,50 and 100 years covering 1888-2022,1888-1950 and 1951-2022 depict that the intensity of heavy rain and above magnitude was highest in 1888-1950 and decreased in 1951-2022.

关键词： Over a century-long timescale Daily precipitation series Extreme precipitation Return period